Hi Trond,
Yes, I already have discovered rpc level dependencies as well
and testing a minnimal patch set for RHEL6.
Thanks,
Tigran.
----- Original Message -----
> From: "Trond Myklebust" <trond.myklebust@xxxxxxxxxxxxxxx>
> To: "Mkrtchyan, Tigran" <tigran.mkrtchyan@xxxxxxx>
> Cc: "linux-nfs" <linux-nfs@xxxxxxxxxxxxxxx>
> Sent: Tuesday, June 16, 2015 2:32:04 PM
> Subject: Re: crash on read overflow
> Hi Tigran,
>
> On Tue, Jun 16, 2015 at 6:08 AM, Mkrtchyan, Tigran
> <tigran.mkrtchyan@xxxxxxx> wrote:
>>
>>
>> Hi Trond,
>>
>> with RHEL6 kernel we observe kernel panic if server reply
>> more data than client requested. This is obviously fixed in
>> RHEL7 and upstream. Unfortunately, kernel crashes so badly
>> that I can't get any stacktrace. My guess is that
>> commit 64bd577ea0021f5903505de061b3b7d8a785ee94 is the one
>> which fixes the issue. Can you confirm?
>>
>
> That should help, but you also need to ensure that they have applied
> commit bfeea1dc1c92 ("SUNRPC: Don't decode beyond the end of the RPC
> reply message").
>
> You might possibly also need commit 1537693ceaa8 ("SUNRPC: Clean up
> xdr_set_iov()") and commit 76cacaabf15a ("SUNRPC: xdr_read_pages needs
> to clear xdr->page_ptr.") since those are all dependencies for
> bfeea1dc1c92.
>
> Cheers
> Trond
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